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FAA Warns 787s Can Lose All Electrical Power in Certain Circumstances

Issue can occur after Boeing Dreamliners remain connected to power source for extended periods

Nearly four years after Boeing Co.’s 787 Dreamliner entered commercial service, federal regulators are moving to combat a potentially dangerous software glitch they said can cause a total loss of electrical power that would endanger the aircraft.

A Federal Aviation Administration safety directive that became public on Thursday reveals that Boeing’s laboratory tests discovered that under certain circumstances, all of the 787’s power...

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